Abstract
The trial was conducted at Planaltina, Federal District, Brazil (15°35' S, 47°42' W; 1,007 m asl) from January 2012 to March 2013. Local annual rainfall averages 1,230 mm, concentrated between October and March. The soil of the area is classified as Oxisol with pH 4.2; P (Mehlich-I) 0.33 mg/dm
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